<script setup>
import { userRegisterService,userLoginService } from '@/api/user.js'
import { userUserStore } from '@/stores'
import { User, Lock } from '@element-plus/icons-vue'
import { ref, watch } from 'vue'
import { useRouter } from 'vue-router'
const isRegister = ref(true)
const form = ref()
// 注册
const formModel = ref({
  username: '',
  password: '',
  repassword: ''
})
// 整个表单的校验规则
// 1.非空校验 required:true  message消息提示 trigger触发校验的时机  blur change
// 2.长度校验 min:xx,max:xx
// 3.正则校验 pattern:正则校验   \S 非空字符
// 4.自定义校验 => 自己写逻辑校验 (校验函数)
//    validator: (rule,value,callback) 
//    (1)rule 当前校验规则相关的信息
//    (2)value 所校验的表单元素目前的表单值
//    (3)callback 无论成功还是失败，都需要callback
//        - acllback()校验成功
//        - acllback(new Error(错误信息))校验失败
const rules = {
  username: [
    { required: true, message: '请输入用户名', trigger: 'blur' },
    { min: 5, max: 10, message: '用户名必须是5-10位的字符', trigger: 'blur' }
  ],
  password: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    {
      pattern: /^\S{6,15}$/,
      message: '密码必须是6-15位的非空字符',
      trigger: 'blur'
    }
  ],
  repassword:[
    { required: true, message: '请输入密码', trigger: 'blur' },
    {
      pattern: /^\S{6,15}$/,
      message: '密码必须是6-15位的非空字符',
      trigger: 'blur'
    },
    {
      validator:(rule,value,callback)=>{
        // 判断value 和 当前 form中收集的password
        if(value !== formModel.value.password){
          callback(new Error('两次密码不一致'))
        }else{
          callback()  //就算校验成功，也需要callback
        }
      }
    }
  ]
}


const register = async ()=>{
  //注册成功之前，先进行校验，校验成功 -> 请求， 校验失败-> 自动提示
  await form.value.validate()
  await userRegisterService(formModel.value)
  ElMessage.success('注册成功')
  // 切换到登录
  isRegister.value = false
}

const userStore = userUserStore()
const router = useRouter()
const login = async ()=>{
  await form.value.validate()
  const res  = await userLoginService(formModel.value)
  userStore.setToken(res.data.token)
  console.log('开始登录',res);
  ElMessage.success('登录成功')
  router.push('/')
}

// 切换的时候，重置表单内容
watch(isRegister,()=>{
  formModel.value ={
    username:'',
    password:'',
    repassword:''
  }
})
</script>

<template>
  <!-- 1.el-row表示一行，一行分成24份
       el-col表示列 
       (1) :span="12"  代表在一行中，占12份(50%)
       (2) :span="6"   表示在一行中，占6份 (25%)
       (3) :offset="3"  代表在一行中，左侧margin份数

       el-form 整个表单组件
       el-form-item 表单的一行  (一个表单域)
       el-input 表单元素(输入框)
     2.校验相关
      (1) el-from => :model="ruleForm"  绑定整个form的数据对象 {xxx,xxx,xxx}
      (2) el-from => :rules="rules" 绑定整个rules规则对象  {xxx,xxx,xxx}
      (3) 表单元素 => v-model="ruleForm.xxx" 给表单元素，绑定的子属性
      (4)el-form-item prop配置生效的是哪个校验规则 (rules中的字段要对应)
   -->
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
     <!--注册相关表单 -->
      <el-form :model="formModel" :rules="rules"  ref="form" size="large" autocomplete="off" v-if="isRegister">
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input 
          v-model="formModel.password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item prop="repassword">
          <el-input
          v-model="formModel.repassword"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入再次密码"
          ></el-input>
        </el-form-item>
        <el-form-item>
          <el-button @click="register"  class="button" type="primary" auto-insert-space>
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false">
            ← 返回
          </el-link>
        </el-form-item>
      </el-form>

      <!-- 登录相关表单 -->
      <el-form :model="formModel" :rules="rules" ref="form" size="large" autocomplete="off" v-else>
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
          v-model="formModel.password"
            name="password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码？</el-link>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button @click="login" class="button" type="primary" auto-insert-space
            >登录</el-button
          >
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true">
            注册 →
          </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
.login-page {
  height: 100vh;
  background-color: #fff;
  .bg {
    background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
      url('@/assets/login_bg.jpg') no-repeat center / cover;
    border-radius: 0 20px 20px 0;
  }
  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;
    .title {
      margin: 0 auto;
    }
    .button {
      width: 100%;
    }
    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>
